世界银行：学校关闭时的学习：H1N1疫情对学习损失和学习差距的影响（英文版）

This paper contributes to the growing body of evidence on the effects of school closures on learning outcomes, focusing on a recent event in a developing country. During the 2009 H1N1 pandemic outbreak, a significant number of public schools in São Paulo state, Brazil, extended the winter break by two to three weeks. By employing doubleand triple-difference estimates, the study reveals that even such a relatively short period of school closure can result in a learning deficit equivalent to si